On OpenVMS and UNIX, users may also create their own PMDF personal
mailing lists. Such personal mailing lists are defined using the PMDF
DB utility or PMDF MAIL's ALIAS commands on OpenVMS, or using the
pmdf db utility on UNIX, and the definitions are stored in
the user's personal alias database. Such personal mailing list
definitions are therefore quite akin to system mailing list definitions
that might be stored in the PMDF system alias database, but made at a
user level.
Users may either choose to keep their personal mailing list definitions
entirely private---only the user himself can use the list definition to
send to the list. Or users may choose to mark some of their personal
mailing lists as PUBLIC lists; in that case, other users may send to
the first user's personal mailing list by sending to
firstuser+listname@domainname
That is, users may make PUBLIC (i.e., "publish")
their personal list definitions as subaddresses of their own address.
See the appropriate edition of the PMDF User's Guide for additional details.